Corner-unit planning
Kerb Corner Piece Calculator
Count dedicated kerb corner units separately from straight kerbs. Keep external and internal corners visible, apply different quantities when needed, and add an explicit purchasing allowance.
Corner schedule
Some products use prefabricated left/right or internal/external corner pieces. Enter your product-specific unit requirement.
Enter the corner counts.
How the calculation works
External demand = external corners × units per corner
Internal demand = internal corners × units per corner
Total planning quantity = ceiling((external + internal) × (1 + allowance))
Internal demand = internal corners × units per corner
Total planning quantity = ceiling((external + internal) × (1 + allowance))
Why separate corner types?
Corner geometry is product-specific. One system may need one molded unit for a corner while another may require a pair or fabricated pieces. Separate inputs prevent hidden assumptions.
Purchasing note
For tight quantities, confirm the manufacturer's corner compatibility, handedness and joint detail before purchase.
Frequently Asked Questions
How many corner pieces do I need?
Enter the number of actual corners and units required per corner.
Are external and internal corners the same?
Not necessarily.
Should I add spares?
A small explicit allowance can be useful.